Simulated branch and simulated christmas tree

ABSTRACT

The invention discloses a simulated branch and simulated Christmas tree. The simulated branch of the present invention includes a trunk and twigs and leaves; the simulated branch is integrally injection-molded with sun-proof plastic, a core strip inside the branch is wrapped by injection molding, and an assembled exposed portion of an inner core of the trunk also has a baking paint layer that is in sealing engagement with an injection molding layer, so that the entire branch forms a sealing waterproof and rust-proof structure with good waterproof, rust-proof and sun-proof effects. The simulated Christmas tree of the present invention is assembled by sealed plugging of a branch into a trunk, the entire simulated Christmas tree has good waterproof, rust-proof and sun-proof effects, and the branch is the above-mentioned simulated branch, which is convenient for transportation and transfer and has a high recycling rate.

BACKGROUND OF THE INVENTION

The invention relates to the technical field of simulation processing, in particular to a simulated branch and simulated Christmas tree.

Simulated plants are handicrafts designed and made by using high-simulation raw materials, and close to real plants in shape, which not only beautifies the environment, but also has the characteristics of easy management, simplicity and beauty, and green and environmental protection. Among the simulated plants, simulated Christmas trees have a considerable scale in the market because they can effectively solve the problem that traditional Christmas trees consume a lot of forest resources, and have the advantages of low costs and high recycling rates.

The conventional method of producing the simulated Christmas trees mainly includes bundled binding molding. The simulated Christmas trees formed by binding molding are mainly tied with iron wires, which is easy to form uneven bound bundle nodes or irregular twigs and leaves, and poor appearances, and the twigs and leaves are all formed by cutting, which has low simulation and poor viewing. In addition, there are also simulated Christmas trees that are assembled by hooking twigs and leaves on a trunk, where hooking assembly is mainly through the flexible connection of iron cores with hooks on the twigs and leaves and iron hoops set on an outer periphery of the trunk via a pin axis. The assembled simulated Christmas trees can be disassembled and transferred, are convenient to transport, and have relatively beautiful overall appearances, but the simulation is still not high.

Moreover, the current simulated Christmas tree, whether it is a bound simulated Christmas tree or an assembled simulated Christmas tree, cannot be placed outdoors for a long time. Whether the bound simulated Christmas tree or the assembled simulated Christmas tree is placed indoors or outdoors for a long time, the exposed structures such as iron wires, iron cores, iron hoops, etc. will rust. It is more likely to be exposed to the sun and rain when placed outdoors, accelerating the rusting and aging of iron wires, etc., which not only seriously affects the overall appearance, but also makes reuse impossible. In addition, after the existing simulated Christmas tree is exposed to the sun outdoors, the twigs and leaves will be seriously aged, discolored, and lose their original beauty.

BRIEF SUMMARY OF THE INVENTION

In order to solve the problems that the simulation effect of the existing simulated Christmas tree is poor, the appearance is not beautiful, and the existing simulated Christmas tree cannot be placed outdoors due to its inability to be waterproof, rust-proof and sun-proof, the present invention provides a simulated branch. The simulated branch is an injection-molded simulated branch, and is provided with corresponding waterproof and rust-proof structures. At the same time, the outer covered injection molding material is made of sun-proof material, which can be effective against water, rust and sun.

Another purpose of the present invention is to provide a simulated Christmas tree. The simulated Christmas tree is assembled based on the simulated branch, where there is an assembly sealing structure between the branch and the trunk, so that the entire assembled tree has an excellent simulation effect and a beautiful appearance, can be effective against water, rust and sun, and has a wider range of applications.

The purpose of the present invention is achieved through the following technical solutions.

A simulated branch, including a trunk and twigs and leaves; the trunk including an inner core and an outer skin layer, and the outer skin layer being wrapped outside the inner core; the twigs and leaves including twigs and leaves, the twigs including skin layers, the leaves being connected to the skin layers of the twigs by integral injection molding, and the skin layers of the twigs being connected to the outer skin layer of the trunk by integral injection molding.

In a preferred embodiment, the inner core has an assembly end protruding from the outer skin layer, the assembly end of the inner core has a baking paint layer, and the baking paint layer is in sealing engagement with the outer skin layer.

In a preferred embodiment, the twigs have embedded cores; the skin layers of the twigs are wrapped outside the embedded cores.

A simulated Christmas tree, including a trunk and a branch, and the branch being the simulated branch according to any one of the above; the trunk including a bark layer, and the bark layer having a plug-in portion; the plug-in portion having a plug-in hole, and the branch being pluggable into the plug-in hole;

a trunk of the branch having a first sealing structure, and the plug-in portion having a second sealing structure corresponding to the first sealing structure; when the branch is plugged into the plug-in hole, the first sealing structure cooperating with the second sealing structure to seal the plug-in hole.

In a preferred embodiment, the first sealing structure includes a plurality of ring gears protruding toward the plug-in portion, and the plurality of ring gears are sequentially distributed along a radial direction;

the second sealing structure includes a plurality of tooth spaces corresponding to the plurality of the ring gears one-to-one.

In a more preferred embodiment, an outermost ring gear of the first sealing structure is a first ring gear, and a raised height of the first ring gear is greater than a height of remaining ring gears; an outer periphery of the plug-in portion has a groove correspondingly matched to the first ring gear.

In a more preferred embodiment, the trunk of the branch has a locking structure protruding along a radial direction, and an inner wall of the plug-in hole has a locking guide groove adapted to the locking structure; the locking guide groove has an extension length along a circumferential direction, and the locking guide groove has an inclination angle relative to a plug-in axial direction;

the inner wall of the plug-in hole also has a plug-in guide groove along the plug-in axial direction, the plug-in guide groove is adapted to the locking structure, and the plug-in guide groove and the locking guide groove are connected.

In a further preferred embodiment, the inclination angle of the locking guide groove is 5-10°.

In a further preferred embodiment, the locking guide groove at least includes two locking guide grooves symmetrically distributed along the plug-in guide groove.

In a more preferred embodiment, the trunk includes a tree core, and the bark layer covers the tree core.

In a preferred embodiment, for the simulated Christmas tree according to any one of the above, the leaves of the branch, the skin layers of the twigs, the outer skin layer of the trunk, and the bark layer of the trunk are all made of sun-proof plastic;

by mass percentage, the sun-proof plastic is composed of 96-97% resin matrix, 1.5-2.0% phenyl salicylate, 0.8-1.3% titanium dioxide powder, and 0.5-1.0% zinc oxide powder.

More preferably, the resin matrix includes one or more of polypropylene carbonate (PPC) and polyethylene (PE).

Compared with the prior art, the present invention has the following advantages and beneficial effects:

The simulated branch of the present invention adopts integral injection molding, so that the inner core strip of the branch is wrapped by injection molding, and an assembled exposed portion of an inner core of the trunk also has a baking paint layer that is in sealing engagement with an injection molding layer, so that the entire branch forms a waterproof and rust-proof sealing structure, and is injection-molded using injection molding materials with sun-proof effects, so that the entire branch independently has good waterproof, rust-proof and sun-proof effects.

The simulated Christmas tree of the present invention is formed by plugging assembly of the simulated branch and the trunk, which is convenient for transportation and transfer. In addition, a corresponding assembly plug-in structure is provided, and a sealing structure for sealing the plug-in structure is provided at the same time, which can allow a complete seal between the trunk and the branch after the assembly is completed, improve the entire tree appearance, and effectively prevent dust and water seepage. Meanwhile, the simulated branch used has good waterproof, rust-proof and sun-proof effects, and the bark layer of the trunk also has good waterproof, rust-proof and sun-proof effects, which enables the entire simulated Christmas tree to withstand the sun and rain without rusting, discoloration and other aging conditions, expands the application scenarios of the simulated Christmas tree, and improves its recycling rate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an overall structure of a simulated branch;

FIG. 2 is a structural schematic diagram of a partial cross-section of a simulated branch;

FIG. 3 is a structural schematic diagram of a simulated Christmas tree;

FIG. 4 is structural schematic diagram of a trunk;

FIG. 5 is an enlarged structural schematic diagram of part A in FIG. 2 ;

FIG. 6 is a cross-sectional structural schematic diagram of a first sealing structure;

FIG. 7 is an enlarged structural schematic diagram of part B in FIG. 4 ;

FIG. 8 is a schematic diagram of an internal structure of a plug-in portion of a bark layer;

Reference numerals: 1—simulated branch, 11—trunk, 111—inner core, 1110—assembly end, 112—outer skin layer, 113—first sealing structure, 1131—ring gear, 11310—first ring gear, 114—locking structure, 115—baking paint layer, 12—twig and leaf, 121—twig, 1211—embedded core, 1212—skin layer, 122—leaf, 2—trunk, 21—tree core, 22—bark layer, 221—plug-in portion, 2211—plug-in hole, 2212—locking guide groove, 2213—plug-in guide groove, 222—second sealing structure, 2221—tooth space, 22210—groove.

DETAILED DESCRIPTION OF THE INVENTION

The technical solutions of the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings, but the protection scope and implementation of the present invention are not limited thereto.

In the description of specific embodiments, it should be noted that the orientation or positional relationship indicated by the terms “upper”, “lower”, “left”, “right”, “front”, “rear”, “inner”, “outer”, etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the inventive product is usually placed in use, and the terms “first”, “second”, etc. are used for the convenience of distinction, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred structure or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention, nor should they be construed as indicating or implying relative importance.

Unless otherwise expressly specified and limited, the terms “installation”, “arrangement”, “connection”, “fixation”, etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal communication between two elements or an interactive relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations. Additionally, when the term “and/or” is used, it is intended herein to include any and all combinations of one or more of the associated listed items.

The directional relationship indicated by the terms “axial direction”, “radial direction”, “circumferential direction”, etc. can be understood according to the conventional knowledge in the art. For example, in the description of specific embodiments, the “axial direction” of a component mainly refers to the direction of the component along its length, while “radial direction” of a component mainly refers to the direction in which the diameter of the component extends outward, and “circumferential direction” of a component mainly refers to the direction around the outer circumference of the component.

The simulated branch of the present invention, as shown in FIG. 1 and FIG. 2 , includes a trunk 11 and a twig and leaf 12. There can be a plurality of twigs and leaves 12, the plurality of twigs and leaves 12 are arranged around the peripheral side of the trunk 11, and the angles of the twig and leaf 12 surrounding the trunk 11 can be 0°, 90°, 180°, 270°, etc. The specific surrounding angle is not limited. Moreover, the plurality of twigs and leaves 12 may not surround the trunk 11 in the same plane. Specifically, the trunk 11 has a plurality of segments along the axial direction, each segment is connected with one or more twigs and leaves 12, and the twigs and leaves 12 between adjacent segments may be arranged staggered or straight with respect to each other.

In a preferred embodiment, the trunk 11 includes an inner core 111 and an outer skin layer 112. The material of the inner core 111 can be selected from but not limited to iron, aluminum, etc., preferably an iron core, where the outer skin layer 112 is wrapped outside the inner core 111 by injection molding. The twig and leaf 12 includes a twig 121 and a leaf 122, where the leaf 122 is connected to one end of the twig 121, and the other end of the twig 121 is connected to the trunk 11 to form a whole branch.

Specifically, the twig 121 includes a skin layer 1212, the leaf 122 is connected to one end of the skin layer 1212 of the twig 121 by integral injection molding, and the other end of the skin layer 1212 of the twig 121 is connected to the outer skin layer 112 of the trunk 11 by integral injection molding. The leaf 122 is directly injection molded, the leaf 122, the skin layer 1212 of the twig 121 and the outer skin layer 112 of the trunk 11 are connected to each other by integral injection molding, and the whole branch is an integral injection molding structure.

In an optional embodiment, some twigs 121 may be provided with embedded cores 1211. For example, some twigs 121 with longer lengths, or twigs 121 connected with many leaves 122 may have embedded cores 1211 therein. The skin layer 1212 of the twig 121 is wrapped outside the embedded core 1211, and the corresponding twig 121 has strength, so that the twig 121 is straight. The material of the embedded core 1211 can be selected but not limited to iron, aluminum, etc., preferably an iron core.

The simulated branch is an independent branch structure, which can be assembled with the trunk to form a whole simulated tree, and the assembling method with the trunk can be plugged or hooked. The inner core 111 has an assembly end portion 1110 protruding from the outer skin layer 112, the assembly end portion 1110 is not injection-molded and encapsulated, and the assembly end portion 1110 may be a positioning portion for plugging assembly, or the assembly end 1110 can be bent at the end to form a hook, and through cooperation with a pin axis, the whole simulated branch can be hooked on the trunk.

In a preferred embodiment, the assembly end 1110 of the inner core 111 has a baking paint layer 115, so that the outer surface of the assembly end 1110 that is not injection-molded and encapsulated is covered with a dense paint film layer to seal and protect the assembly end 1110. Moreover, when the simulated branch is formed, the assembly end 1110 of the inner core 111 is first baked to form a baking paint layer 115, and then the outer skin layer 112 is covered by injection molding outside the inner core 111, where the baking paint layer 115 is in sealing engagement with the outer skin layer 112, so that the inner core 111 of the trunk 11 is completely covered and sealed, and is isolated from the external environment.

-   -   the leaf 122, the skin layer 1212 of the twig 121 and the outer         skin layer 112 of the trunk 11 are integrally injection molded,         and the assembly end 1110 of the inner core 111 is coated with         the baking paint layer 115, so that the entire inner core 111         and the embedded core 1211 of the branch 121 can be effectively         sealed and packaged for protection, isolated from the external         environment, and effectively waterproof and rust-proof, ensuring         the service life of the entire simulated tree branch and         improving its recycling rate.

The simulated Christmas tree of the present invention, as shown in FIG. 3 , includes a trunk 2 and a branch 1. The branch 1 is set to be plugged into the trunk 2, and the used branch 1 is the simulated branch of the present invention. The simulated Christmas tree is formed by plugging assembly of the branch 1 and the trunk 2, and the branch 1 is an integrally injection-molded branch. The branch 1 itself has good ductility and is not easily deformed by folding. Both the branch 1 and the trunk 2 can be transported and transferred separately, so as to facilitate the transportation and transfer of the entire simulated Christmas tree.

Referring to FIG. 4 , the trunk 2 includes a bark layer 22, and the bark layer 22 has a plug-in portion 221 thereon. Specifically, there are a plurality of plug-in portions 221, each plug-in portion 221 can be plugged into the branch 1 correspondingly, the plurality of plug-in portions 221 are arranged around the bark layer 22, the surrounding angle can be 0°, 90°, 180°, 270°, etc., and the specific surrounding angle is not limited; moreover, the plurality of plug-in portions 221 may not surround the bark layer 22 in the same plane, and the adjacent plug-in portions 221 distributed in the axial direction of the bark layer 22 may be arranged staggered or straight.

Specifically, the plug-in portion 221 has a plug-in hole 2211, the end where the assembly end 1110 of the branch 1 is located is an assembly plug-in end, and the assembly plug-in end of the branch 1 can be plugged into the plug-in hole 2211, so that the branch 1 is plugged and assembled on the trunk 2 to form an entire simulated Christmas tree.

In an optional embodiment, the trunk 2 may be an integrally injection-molded rod body, and the bark layer 22 is an integrally injection-molded outer layer of the injection-molded rod body. Alternatively, a tree core 21 can be arranged in the trunk 2, and the material of the tree core 21 can be selected from but not limited to iron, aluminum, etc., preferably an iron core; the bark layer 22 is wrapped outside the tree core 21, specifically, the bark layer 22 is wrapped outside the tree core 21 by injection molding, forming a complete cover for the tree core 21, and the entire trunk 2 having the tree core 21 has better rigidity.

In a preferred embodiment, the trunk 11 of the branch 1 has a first sealing structure 113, and the plug-in portion 221 has a second sealing structure 222 corresponding to the first sealing structure 113. When the branch 1 is plugged into the plug-in hole 2211, the first sealing structure 113 cooperates with the second sealing structure 222, so that the branch 1 is in sealing engagement with the plug-in portion 221, and the plug-in hole 2211 is sealed.

Therefore, the entire simulated Christmas tree after the branch 1 is plugged and assembled on the trunk 2 has no obvious assembly traces, which is like a complete integrally injection-molded tree body, and the appearance effect of the entire simulated Christmas tree is improved. Moreover, the assembled entire simulated Christmas tree is like a complete sealed injection-molded body, which has good waterproof and anti-rust protection effects on the inner tree core 21, inner core 111, etc., and can be placed in high humidity and other environments, effectively improving the service life of the entire simulated Christmas tree, thereby improving the recycling rate of the entire simulated Christmas tree.

Specifically, referring to FIG. 5 and FIG. 6 , in a preferred embodiment, the first sealing structure 113 includes a plurality of ring gears 1131 protruding toward the plug-in portion 221, and the plurality of ring gears 1131 are successively distributed in a radial direction. Optionally, the ring gear 1131 can be a regular annular toothed structure. For example, the radially inner and outer sides of the toothed shape are equal in length, and the distance between each crest and the center of the branch 1 is equal. Alternatively, the ring gear 1131 can be an irregular annular toothed structure. For example, the radially inner and outer lengths of the toothed shape may vary locally or everywhere, or the distance between each crest and the center of the branch 1 varies locally or everywhere.

Referring to FIG. 7 , the second sealing structure 222 is disposed on the outer periphery of the top of the plug-in hole 2211, the second sealing structure 222 includes a plurality of tooth spaces 2221, the plurality of the tooth grooves 2221 are in one-to-one correspondence with the plurality of ring gears 1131, and the tooth spaces 2221 have an opening degree adapted to the ring gears 1131. When the branch 1 is plugged into the trunk 2 and the first sealing structure 113 and the second sealing structure 222 are in sealing cooperation, the ring gears 1131 of the first sealing structure 113 are engaged with the tooth spaces 2221 of the second sealing structure 222 in one-to-one correspondence, and the corresponding engagement structures form a sealing fit.

Since both the ring gears 1131 and the tooth spaces 2221 are plastic-molded structures, when they are engaged with each other, the engagement degree is high, so that good sealing can be formed during the engagement. Moreover, since the ring gears 1131 are successively distributed in the radial direction, and sequentially engaged with the corresponding plurality of tooth spaces 2221 successively distributed in the radial direction, thereby forming a plurality of sealing engagement structures in the radial direction, the outside water, dust, etc., when entering, will be blocked by a plurality of continuous sealing engagement structures in turn, so that they cannot really reach the plug-in hole 2211, and the waterproof and rust-proof effects are excellent.

In a further preferred embodiment, referring to FIG. 5 and FIG. 6 again, the outermost ring gear of the first sealing structure 113 is a first ring gear 11310, where a raised height of the first ring gear 11310 toward the plug-in portion 221 is greater than that of the remaining ring gears 1131; and referring to FIG. 7 again, the outer periphery of the plug-in portion 221 has a groove 22210 correspondingly matched to the first ring gear 11310.

When the branch 1 is plugged into the trunk 2 and the first sealing structure 113 is in sealing engagement with the second sealing structure 222, the first ring gear 11310 is engaged with the groove 22210, forming a coating on the outer periphery of the end of the integral plug-in portion 221. After the branch 1 is plugged and assembled on the trunk 2, the branch 1 is in an expanded state with the branch head facing upward, i.e., the first ring gear 11310 of the first sealing structure 113 is downwardly wrapped around the outer periphery of the end of the plug-in portion 221, based on the flow state of water under its own gravity, the water flowing down from the branch head of the branch 1 will drip down along the surface of the first ring gear 11310 or flow to the surface of the bark layer 22 of the trunk 2 instead of flowing reversely into the interior of the first ring gear 11310; and due to the higher raised height of the first ring gear 11310, the corresponding sealing engagement structure has a long stroke, and the partially upward rushing water flow still cannot easily pass through the sealing engagement structure, and the external dust even cannot easily pass through the sealing engagement structure. Therefore, the first ring gear 11310 and the groove 22210 form a preliminary and highly efficient protective effect, and have better waterproof and rust-proof effects on the structure in the plug-in hole 2211.

In a further preferred embodiment, referring to FIG. 5 again, the outer skin layer 112 of the trunk 11 of the branch 1 has a radially protruding locking structure 114. Specifically, the locking structure 114 is an integrated protruding structure on the outer surface of the outer skin layer 112, and the protruding structure can be a boss or a convex column, and can be a regular or irregular shape structure.

Referring to FIG. 8 , the inner wall of the plug-in hole 2211 has a locking guide groove 2212 adapted to the locking structure 114. The locking guide groove 2212 has an extension length along the circumferential direction, the locking guide groove 2212 is adapted to the locking structure 114, the locking structure 114 entering the locking guide groove 2212 can slide and move along the extension length of the locking guide groove 2212, and the locking guide groove 2212 has an inclination angle relative to a plug-in axial direction. In addition, the inner wall of the plug-in hole 2211 also has a plug-in guide groove 2213 along the plug-in axial direction, and the plug-in guide groove 2213 communicates with the locking guide groove 2212, the locking structure 114 can enter the locking guide groove 2212 through the plug-in guide groove 2213, specifically, the inclination direction of the locking guide groove 2212 is downward inclination from the end connected with the plug-in guide groove 2213 to the other end away from the plug-in guide groove 2213.

During the plugging assembly of the branch 1 and the trunk 2, in the process of plugging the assembly plug-in portion of the branch 1 into the plug-in hole 2211, the locking structure 114 is aligned with the plug-in guide groove 2213 and slides along the plug-in guide groove 2213 into the plug-in hole 2211, so that the assembly plug-in portion of the branch 1 is oriented and plugged into the plug-in hole 2211. After the assembly plug-in portion of the branch 1 is plugged into the plug-in hole 2211 in place, the first sealing structure 113 is in sealing contact with the second sealing structure 222, and the locking structure 114 is located at the communication intersection of the plug-in guide groove 2213 and the locking guide groove 2212. At this time, the branch 1 is rotated to make the locking structure 114 slide into the locking guide groove 2212. During the inclined sliding process of the locking structure 114 along the extension length of the locking guide groove 2212, due to the in-position contact limit between the first sealing structure 113 and the second sealing structure 222, the locking structure 114 and the locking guide groove 2212 are gradually latched and locked. At the same time, the contact between the first sealing structure 113 and the second sealing structure 222 is tighter, so that the first sealing structure 113 and the second sealing structure 222 complete the sealing cooperation. Moreover, since the locking structure 114 and the locking guide groove 2212 are latched and locked, the branch 1 is stably plugged into the trunk 2 and cannot be pulled out directly.

When it is necessary to disassemble and separate the branch 1 and the trunk 2, the branch 1 is rotated in an opposite direction to unlock the latch between the locking structure 114 and the locking guide groove 2212, and the branch 1 can be easily pulled out.

Specifically, the inclination angle of the locking guide groove 2212 can be designed according to actual needs. In some preferred embodiments, the inclination angle of the locking guide groove 2212 is designed to be 5-10°, such as 5°, 8°, 9°, 10°, etc. The inclination angle of the locking guide groove 2212 is designed within this angle range, so that the locking structure 114 can slide along the extended length in the locking guide groove 2212 for a certain stroke before completing the latching and locking with the locking guide groove 2212, and the locking will not be completed when the locking structure 114 just extends into the locking guide groove 2212, which effectively ensures the locking stability between the locking structure 114 and the locking guide groove 2212, thereby ensuring the stability of the plugging assembly between the branch 1 and the trunk 2, as well as the stability of the sealing cooperation between the first sealing structure 113 and the second sealing structure 222.

In other preferred embodiments, referring to FIG. 8 again, the locking guide groove 2212 includes at least two locking guide grooves, and two locking guide grooves 2212 belong to a group and are arranged symmetrically along the plug-in guide groove 2213, where the two locking guide grooves 2212 in the same group and the plug-in guide groove 2213 have the same communication junction, and the locking structure 114 located at the communication junction can slide leftward into the locking guide groove 2212 on the left side for matching and locking, or can slide rightward into the locking guide groove 2212 on the right side for matching and locking. Therefore, when the branch 1 is rotated to make the locking structure 114 slide into the locking guide groove 2212 for locking, the branch 1 can be rotated in the left or right direction to enable the locking structure 114 to slide into the locking guide groove 2212, without the need to fix the direction, which facilitates the plugging assembly of the branch 1 and the trunk 2.

In addition, the simulated Christmas tree of the present invention includes the leaf 122 of the branch 1, the skin layer 1212 of the twig 121, the outer skin layer 112 of the branch 11, and the bark layer 22 of the trunk 2, all of which are made of sun-proof plastic. Therefore, the entire simulated Christmas tree can be sun-proof, and has good waterproof, anti-rust and sun protection effects, so that the entire simulated Christmas tree can withstand the sun and rain without rusting, discoloration and other aging conditions, expanding the application scenarios of the simulated Christmas tree, and improving its recycling rate.

In a preferred embodiment, the sun-proof plastic used in the leaf 122 of the branch 1, the skin layer 1212 of the twig 121, the outer skin layer 112 of the branch 11, and the bark layer 22 of the trunk 2, by mass percentage, is composed of 96-97% resin matrix, 1.5-2.0% phenyl salicylate, 0.8-1.3% titanium dioxide powder, and 0.5-1.0% zinc oxide powder. In some preferred embodiments, the sun-proof plastic is composed of 96.4 wt % resin matrix, 1.5 wt % phenyl salicylate, 1.2 wt % titanium dioxide powder, and 0.9 wt % zinc oxide powder.

The resin matrix includes one or more of polypropylene carbonate (PPC) and polyethylene (PE). For example, in some embodiments, it can be polypropylene carbonate or polyethylene alone, or a compound of polypropylene carbonate and polyethylene. In some preferred embodiments, the resin matrix in the sun-proof plastic is a compound of polypropylene carbonate and polyethylene in a mass ratio of 3:2.

Experimental Test

1. Transmittance Test

According to the composition of plastic components of example 1 and comparative examples 1-5 in Table 1 below, corresponding plastic samples are prepared. The symbol “/” indicates that the corresponding component is not contained.

TABLE 1 Composition of plastic (mass percentage, wt %) Component Example Comparative Comparative Comparative Comparative Comparative samples 1 example 1 example 2 example 3 example 4 example 5 PPC 57.9 98.0 2.0 98.0 1.5 96.0 PE 28.5 2.0 98.0 1.0 97.5 1.0 Phenyl salicylate 1.5 / / 0.8 0.5 / Titanium dioxide 1.2 / / 0.2 0.2 3.0 Zinc oxide 0.9 / / / 0.1 /

The corresponding plastic of example 1 and comparative examples 1-5 is made into films, which are then cured at a high temperature and molded into sheets with a thickness of 1.0 mm. A LED light source is used to emit ultraviolet light to penetrate the sheets, the wavelength at the center of the light source is 364.87 nm, and the intensity is 57982.39. The ultraviolet transmittance test is carried out by using the ultraviolet detector LUYOR-340, and experimental results are shown in Table 2.

TABLE 2 Ultraviolet transmittance test results Example Comparative Comparative Comparative Comparative Comparative Sample 1 example 1 example 2 example 3 example 4 example 5 Strength 1524.94 42048.83 35850.51 28625.91 24462.77 10790.52 Transmittance 2.63 72.52 61.83 49.37 42.19 18.61 T (%)

According to the test results in Table 2, the sun-proof plastic of the present invention composed of 96.4 wt % resin matrix, 1.5 wt % phenyl salicylate, 1.2 wt % titanium dioxide powder, and 0.9 wt % zinc oxide powder has a good anti-ultraviolet effect and a low ultraviolet transmittance, indicating that the plastic of the present invention composed of 96-97% resin matrix, 1.5-2.0% phenyl salicylate, 0.8-1.3% titanium dioxide powder, and 0.5-1.0% zinc oxide powder has a good anti-ultraviolet effect.

2. Application Test

The plastic corresponding to example 1 and comparative examples 1-5 are respectively used as the materials of the leaf of the branch, the skin layer of the branch, the outer skin layer of the branch, and the bark layer of the trunk of the simulated Christmas tree of the present invention to prepare the simulated Christmas tree of the present invention.

The prepared simulated Christmas tree is placed outdoors for 14 days naturally. The color change of the appearance of the simulated Christmas tree before and after being placed is compared and observed. At the same time, after being placed outdoors for 14 days, the injection molding glue of the corresponding simulated Christmas tree is cut open, and the rust of the inner core, embedded core, tree core and other internal iron cores is observed. The results are shown in Table 3.

TABLE 3 Sun protection test results Comparative Comparative Comparative Comparative Comparative Sample Example 1 example 1 example 2 example 3 example 4 example 5 Observation The The The The The The result appearance appearance appearance appearance appearance appearance has no turns yellow, turns yellow, turns yellow, turns yellow, turns change, and the and the and the and the yellowish, and the inner iron inner iron inner iron inner iron and the inner iron cores are cores are cores are cores are inner iron cores are free of rust free of rust free of rust free of rust cores are free of rust free of rust

According to the observation results in Table 3, the simulated Christmas tree made of the sun-proof plastic composed of 96.4 wt % resin matrix, 1.5 wt % phenyl salicylate, 1.2 wt % titanium dioxide powder, and 0.9 wt % zinc oxide powder of the present invention has a good anti-ultraviolet effect, indicating that the simulated Christmas tree made of plastic composed of 96-97% resin matrix, 1.5-2.0% phenyl salicylate, 0.8-1.3% titanium dioxide powder, and 0.5-1.0% zinc oxide powder of the present invention has a good anti-ultraviolet effect, can withstand long-term outdoor placement without rusting, discoloration and other aging conditions, expanding the application scenarios of the simulated Christmas tree, and improving its recycling rate.

The above embodiments are only preferred embodiments of the present invention, and are only intended to further describe the technical solutions of the present invention in detail, but the above descriptions are exemplary rather than exhaustive, and are not limited to the disclosed embodiments. The protection scope and implementation of the present invention are not limited to this, and any changes, combinations, deletions, substitutions or modifications that do not depart from the spirit and principle of the present invention will be included in the protection scope of the present invention. 

What is claimed is:
 1. A simulated branch, comprising a trunk and twigs and leaves; the trunk comprising an inner core and an outer skin layer, and the outer skin layer being wrapped outside the inner core; the twigs and leaves comprising twigs and leaves, the twigs comprising skin layers, the leaves being connected to the skin layers of the twigs by integral injection molding, and the skin layers of the twigs being connected to the outer skin layer of the trunk by integral injection molding.
 2. The simulated branch according to claim 1, wherein the inner core has an assembly end protruding from the outer skin layer, the assembly end of the inner core has a baking paint layer, and the baking paint layer is in sealing engagement with the outer skin layer.
 3. The simulated branch according to claim 1, wherein the twigs have embedded cores; the skin layers of the twigs are wrapped outside the embedded cores.
 4. A simulated Christmas tree, comprising a trunk and a branch, and the branch being the simulated branch according to claim 1; the trunk comprising a bark layer, and the bark layer having a plug-in portion; the plug-in portion having a plug-in hole, and the branch being pluggable into the plug-in hole; a trunk of the branch having a first sealing structure, and the plug-in portion having a second sealing structure corresponding to the first sealing structure; when the branch is plugged into the plug-in hole, the first sealing structure cooperating with the second sealing structure to seal the plug-in hole.
 5. The simulated Christmas tree according to claim 4, wherein the first sealing structure comprises a plurality of ring gears protruding toward the plug-in portion, and the plurality of ring gears are sequentially distributed along a radial direction; the second sealing structure includes a plurality of tooth spaces corresponding to the plurality of the ring gears one-to-one.
 6. The simulated Christmas tree according to claim 5, wherein an outermost ring gear of the first sealing structure is a first ring gear, and a raised height of the first ring gear is greater than a height of remaining ring gears; an outer periphery of the plug-in portion has a groove correspondingly matched to the first ring gear.
 7. The simulated Christmas tree according to claim 5, wherein the trunk of the branch has a locking structure protruding along a radial direction, and an inner wall of the plug-in hole has a locking guide groove adapted to the locking structure; the locking guide groove has an extension length along a circumferential direction, and the locking guide groove has an inclination angle relative to a plug-in axial direction; the inner wall of the plug-in hole also has a plug-in guide groove along the plug-in axial direction, the plug-in guide groove is adapted to the locking structure, and the plug-in guide groove and the locking guide groove are connected.
 8. The simulated Christmas tree according to claim 7, wherein the inclination angle of the locking guide groove is 5-10°.
 9. The simulated Christmas tree according to claim 7, wherein the locking guide groove at least comprises two locking guide grooves symmetrically distributed along the plug-in guide groove.
 10. The simulated Christmas tree according to claim 4, wherein the leaves of the branch, the skin layers of the twigs, the outer skin layer of the trunk, and the bark layer of the trunk are all made of sun-proof plastic; by mass percentage, the sun-proof plastic is composed of 96-97% resin matrix, 1.5-2.0% phenyl salicylate, 0.8-1.3% titanium dioxide powder, and 0.5-1.0% zinc oxide powder. 